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  1. Microscopy: Intro to microscopes & how they work (article

    The production and distribution of microscopes, especially electron microscopes, can vary from year to year and depend on several factors. While I don't possess the exact figures for the …

  2. Cell biology and microscopy (article) | Khan Academy

    An electron microscope focuses beams of electrons on specimens instead of visible light. Electron microscopes can visualize details at a much smaller scale compared to light microscopes.

  3. Dalton's atomic theory (article) | Khan Academy

    When Rutherford bombarded a Gold foil with alpha-particles, how come they didn't abandon their straight path towards the many electrons in the foil. Although the electron is much smaller, …

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  5. Microscopia (artigo) | Introdução às células | Khan Academy

    Microscopes are needed to visualize cells. In Life: The science of biology (7th ed., pp. 63-64). Sunderland, MA: Sinauer Associates, Inc. Raven, P. H., Johnson, G. B., Mason, K. A., Losos, …

  6. Microscopie (leçon) | Khan Academy

    Les microscopes électroniques diffèrent des microscopes optiques car ils produisent l'image d'un spécimen en utilisant un faisceau d'électrons et non pas un faisceau de lumière.

  7. The cytoskeleton (article) | Khan Academy

    Modification of work by Dartmouth Electron Microscope Facility, Dartmouth College; scale-bar data from Matt Russell. Lower panel, modification of " Eukaryotic cilium diagram," by Mariana …

  8. Scientific research glossary of terms (video) | Khan Academy

    Scanning electron microscopy is used to study objects at magnifications up to several thousand times which is much higher than with light microscopes. The object is viewed by scanning a …

  9. ATP synthase (video) | Cellular respiration | Khan Academy

    In mitochondria, the hydrogen ions, these protons, the concentration builds up in the intermembrane space right over here because of the electron transport chain.

  10. Activity: biodiversity analyses and unknowns - Khan Academy

    They are images captured with a scanning electron microscope, using a magnification of 500x. The images are of the same collection of pollen, however the second one is color-coded to …